[ExtJS 4.0.2][TextField][qTip] Bug with qTip on disappearing

[ExtJS 4.0.2][TextField][qTip] Bug with qTip on disappearing

When TextField is invalid, on mouseover event qtip is show, and when you click at this time on this field, qTip should disappear but it go on background of the mask layer.

Steps to reproduce the problem:

Create modal window. Add form panel. Add textfield on it. Add some validation of value in this textfield. Write wrong value in this textfield, or leave it blank. qTip with error text will show. While qTip is Visible click on textfield.